maybe it seems to be a classic flickering issue from Windows I guess.
I’m not sure if it is easy to solve or can be suppressed.
Intentional testing method:
Step 0: Please set the refresh rate of your main monitor to over 60Hz, for example, 120Hz.
Step 1: If you have more than one GPU, force the app to use the high-performance GPU in the app settings.
Step 2: Open TuneBrowser.
Step 3: Play any track.
While playing, wait for about 10 seconds. You might see the timebar flickering issue.
If the problem still doesn’t appear, move your mouse to the timebar around on the Player View and click a few times randomly to test if the issue occurs.